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24 Assembly
The pump is assembled in exactly the reverse order. All parts
of the pump now lie in front of the pump on a soft base.
You see that dismantling was very easy.
If you now start with the installation and assembly of the pump,
please take care that the sealing lips of the lip seals are not
damaged.
If you have the impression that the O-ring or indeed all other O-
rings are damaged, replace these by new parts.
Push the rear half of the liner into the pump housing. The rotor,
gate and gate guide are pushed as pre-assembled unit into the
pump housing. Please note that the bore hole in the front of the
rotor points towards you!
To simplify assembly we suggest that you apply a suitable oil or
grease to the pump shaft. Push on the rotor sleeve coupling
Item 36 so that the larger fixing pin engages in the bore hole of
the rotor. Then push the shaft sleeve Item 74 onto the stop so
that the fixing pin engages in the bore hole of the rotor sleeve
coupling Item 36.
Remove the feather key Item 50 from the shaft.
Screw the lock nut Item 56 on the shaft stump and tighten this
(with a special tool) with approx. 200 Nm, to guarantee axial
clamping of shaft sleeve and rotor. For security tighten all
screws in the lock nut with 2,5 Nm!
Caution! Refit the feather key No. 50 and screw this tight!
Push the second half of the liner up to the stop into the pump
housing.
Push the front cover Item 37 (with sealing holder and sealing
rings), guided by the studs, onto the pump housing. Take care
that the housing gasket is in the correct position. Here as well if
you think that the gasket is damaged, replace it!
Screw the 6 cap nuts onto the studs and tighten these
uniformly and firmly, so that the front cover is connected firmly
with the pump housing.
Then push on the front bearing housing. Take care that the
feather key screwed firmly in the shaft sits in the slot of the
spacer sleeve provided for it!
Tighten the 3 Allen screws, fit the front cover and tighten this
firmly.
Revision 4.4 / January 2019
Special –
tool
19
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Troubleshooting
